Removes the elements designated by
OFFSET and
LENGTH from an array, and replaces them with the elements of
LIST, if any. In list context, returns the elements removed from the array. In scalar context, returns the last element removed, or
undef if no elements are removed. The array grows or shrinks as necessary. If
OFFSET is negative then it start that far from the end of the array. If
LENGTH is omitted, removes everything from
OFFSET onward. If
LENGTH is negative, leave that many elements off the end of the array. The following equivalences hold (assuming
$[ == 0):